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BBK Underdrive Pulleys (94-98 V6)

Features

Gain up to 15HP.

Two Piece Kit.

Brilliantly polished finish.

Fits 94-98 Mustang V6.

Description

Gain 15HP. Unleash hidden horsepower and improve throttle response by reducing the amount of power your accessories are draining from your Pony. You may not know it, but you can regain up to 15 "free" horsepower with a set of BBK underdrive pulleys, without sacrificing charging ability or A/C performance.

This will pay for itself. Get this before anything else!

I finally decided to pay the $90 for this pulley as a nice, easy place to start onI finally decided to pay the $90 for this pulley as a nice, easy place to start on modifying my 98 3.8L. It looked like a good return for the dollar, and I was interested in mods that yield both HP and MPG.
The install was quite easy and took less than an hour. I would say, though, that an impact wrench for the alternator nut saves tons of time. Buy or borrow one. Everything else comes off with hand tools. Also, take note that AM's wonderful installation instructions are far more involved than you'll need for this V6 UDP, as they appear to be geared for people who are installing more than just a UDP. They're helpful as a guide but you certainly won't need the pullers since you never mess with anything on the crank itself. If, for some reason, your original pulley is fused to the shaft, just give it a stout sideways blow with a rubber mallet. The instructions included with the UPD are actually quite comprehensive. They don't have the torque specs, but you can find these online and probably don't need them for a simple pulley, anyway.
Don't forget to disconnect the negative battery cable. This way, when you start the car the ECU re-learns its situation and meters out the gas
My car took a 96-inch belt, although I've read about other users setting up with 91's. I'd say try 96' first, and go from there.
Results were immediate. The engine idles far more smoothly than before. I had some mild vibration/shaking problems before the UDP, and now it runs as smooth as silk. The engine seems quite happier and ready to put the power where it needs to be: the rear wheels.
Power gains are notable, although not in-your-face dramatic, but certainly worth the $90 and then some. Throttle response is notably better, and it takes less gas input to do more work now, especially noticeable at low RPM's. Everything runs smoother and easier, with less throttle input required to so the same work, especially in traffic.
What really floored me, though, was the increase in gas mileage. I had previously run anywhere between 23 and 27 MPG, depending on what I had done that week, with 27 MPG being had only once on a highway-only trip using the throttle very lightly and using no AC. Typical mileage has been around 24-25 MPG.
I took a trip the day after installation to see what my new highway economy was. After pumping the gas back in and calculating, I had to check my math two or three times to make sure I hadn't made a huge error. Sure as anything, I had just gotten 31 MPG. For comparison, a 2011 Nissan Altima is advertised around 32 MPG highway. 31 is not bad for a 13-year old car with a least 140,000 miles!
If I work my math out right, assuming gas stays around $4 per gallon, this pulley will pay for itself after 10 tanks and after that, I'll be making money back. It makes no sense NOT to buy this. Your mileage may vary, but for me, it's like having the horsepower of a healthy V6 with the appetite of a 4-cylinder economy car. In fact, I think I get more miles per gallon than my wife's 4-cyl economobile does now.
So, the bottom line is this: This UDP is inexpensive, easy to install, will get you some noticable lost horsepower back, let your engine last longer and work less, and increase your gas mileage enough so that after 10-12 tanks of gas, you will have made your money back and then some. Don't wait. Get it. modifying my 98 3.8L. It looked like a good return for the dollar, and I was interested in mods that yield both HP and MPG.
The install was quite easy and took less than an hour. I would say, though, that an impact wrench for the alternator nut saves tons of time. Buy or borrow one. Everything else comes off with hand tools. Also, take note that AM's wonderful installation instructions are far more involved than you'll need for this V6 UDP. They're helpful as a guide but you certainly won't need the pullers since you never mess with anything on the crank itself. If, for some reason, your original pulley is fused to the shaft, just give it a stout sideways blow with a rubber mallet.
My car took a 96-inch belt, although I've read about other users setting up with 91's. I'd say try 96' first, and go from there.
Results were immediate. The engine idles far more smoothly than before. I had some mild vibration/shaking problems before the UDP, and now it runs as smooth as silk. The engine seems quite happier and ready to put the power where it needs to be: the rear wheels.
Power gains are notable, although not in-your-face dramatic, but certainly worth the $90 and then some. Throttle response is notably better, and it takes less gas input to do more work now, especially noticeable at low RPM's. Everything runs smoother and easier, with less throttle input required to so the same work, especially in traffic.
What really floored me, though, was the increase in gas mileage. I had previously run anywhere between 23 and 27 MPG, depending on what I had done that week, with 27 MPG being had only once on a highway-only trip using the throttle very lightly and using no AC. Typical mileage has been around 24-25 MPG.
I took a trip the day after installation to see what my new highway economy was. After pumping the gas back in and calculating, I had to check my math two or three times to make sure I hadn't made a huge error. Sure as anything, I had just gotten 31 MPG.
If I work my math out right, assuming gas stays around $4 per gallon, this pulley will pay for itself after 10 tanks and after that, I'll be making money back. It makes no sense NOT to buy this. Your mileage may vary, but for me, it's like having the horsepower of a healthy V6 with the appetite of a 4-cylinder economy car. In fact, I think I get more miles per gallon than my wife's 4-cyl econo-car does now.

Quick and Easy

Super simple, takes a just a couple of minutes to install. Noticed increased performance. I was a little worried my alternator wouldn't be able to handle my sound system after this install. After i installed it, I turned my AC to max and the volume all the way up and noticed no difference. If your looking for a simple mod you don't get any better than this.

These pulleys will have nothing to with the power output of the alternator for your sound system. 1400w amp is really nothing to worry about. Get a capacitor or higher output alternator for more power if you desire.

I finally decided to pay the $90 for this pulley as a nice, easy place to start onI finally decided to pay the $90 for this pulley as a nice, easy place to start on modifying my 98 3.8L. It looked like a good return for the dollar, and I was interested in mods that yield both HP and MPG.
The install was quite easy and took less than an hour. I would say, though, that an impact wrench for the alternator nut saves tons of time. Buy or borrow one. Everything else comes off with hand tools. Also, take note that AM's wonderful installation instructions are far more involved than you'll need for this V6 UDP, as they appear to be geared for people who are installing more than just a UDP. They're helpful as a guide but you certainly won't need the pullers since you never mess with anything on the crank itself. If, for some reason, your original pulley is fused to the shaft, just give it a stout sideways blow with a rubber mallet. The instructions included with the UPD are actually quite comprehensive. They don't have the torque specs, but you can find these online and probably don't need them for a simple pulley, anyway.
Don't forget to disconnect the negative battery cable. This way, when you start the car the ECU re-learns its situation and meters out the gas
My car took a 96-inch belt, although I've read about other users setting up with 91's. I'd say try 96' first, and go from there.
Results were immediate. The engine idles far more smoothly than before. I had some mild vibration/shaking problems before the UDP, and now it runs as smooth as silk. The engine seems quite happier and ready to put the power where it needs to be: the rear wheels.
Power gains are notable, although not in-your-face dramatic, but certainly worth the $90 and then some. Throttle response is notably better, and it takes less gas input to do more work now, especially noticeable at low RPM's. Everything runs smoother and easier, with less throttle input required to so the same work, especially in traffic.
What really floored me, though, was the increase in gas mileage. I had previously run anywhere between 23 and 27 MPG, depending on what I had done that week, with 27 MPG being had only once on a highway-only trip using the throttle very lightly and using no AC. Typical mileage has been around 24-25 MPG.
I took a trip the day after installation to see what my new highway economy was. After pumping the gas back in and calculating, I had to check my math two or three times to make sure I hadn't made a huge error. Sure as anything, I had just gotten 31 MPG. For comparison, a 2011 Nissan Altima is advertised around 32 MPG highway. 31 is not bad for a 13-year old car with a least 140,000 miles!
If I work my math out right, assuming gas stays around $4 per gallon, this pulley will pay for itself after 10 tanks and after that, I'll be making money back. It makes no sense NOT to buy this. Your mileage may vary, but for me, it's like having the horsepower of a healthy V6 with the appetite of a 4-cylinder economy car. In fact, I think I get more miles per gallon than my wife's 4-cyl economobile does now.
So, the bottom line is this: This UDP is inexpensive, easy to install, will get you some noticable lost horsepower back, let your engine last longer and work less, and increase your gas mileage enough so that after 10-12 tanks of gas, you will have made your money back and then some. Don't wait. Get it. modifying my 98 3.8L. It looked like a good return for the dollar, and I was interested in mods that yield both HP and MPG.
The install was quite easy and took less than an hour. I would say, though, that an impact wrench for the alternator nut saves tons of time. Buy or borrow one. Everything else comes off with hand tools. Also, take note that AM's wonderful installation instructions are far more involved than you'll need for this V6 UDP. They're helpful as a guide but you certainly won't need the pullers since you never mess with anything on the crank itself. If, for some reason, your original pulley is fused to the shaft, just give it a stout sideways blow with a rubber mallet.
My car took a 96-inch belt, although I've read about other users setting up with 91's. I'd say try 96' first, and go from there.
Results were immediate. The engine idles far more smoothly than before. I had some mild vibration/shaking problems before the UDP, and now it runs as smooth as silk. The engine seems quite happier and ready to put the power where it needs to be: the rear wheels.
Power gains are notable, although not in-your-face dramatic, but certainly worth the $90 and then some. Throttle response is notably better, and it takes less gas input to do more work now, especially noticeable at low RPM's. Everything runs smoother and easier, with less throttle input required to so the same work, especially in traffic.
What really floored me, though, was the increase in gas mileage. I had previously run anywhere between 23 and 27 MPG, depending on what I had done that week, with 27 MPG being had only once on a highway-only trip using the throttle very lightly and using no AC. Typical mileage has been around 24-25 MPG.
I took a trip the day after installation to see what my new highway economy was. After pumping the gas back in and calculating, I had to check my math two or three times to make sure I hadn't made a huge error. Sure as anything, I had just gotten 31 MPG.
If I work my math out right, assuming gas stays around $4 per gallon, this pulley will pay for itself after 10 tanks and after that, I'll be making money back. It makes no sense NOT to buy this. Your mileage may vary, but for me, it's like having the horsepower of a healthy V6 with the appetite of a 4-cylinder economy car. In fact, I think I get more miles per gallon than my wife's 4-cyl econo-car does now.

Super simple, takes a just a couple of minutes to install. Noticed increased performance. I was a little worried my alternator wouldn't be able to handle my sound system after this install. After i installed it, I turned my AC to max and the volume all the way up and noticed no difference. If your looking for a simple mod you don't get any better than this.

When i opened the box i looked at it and said this thing gives you 10-15 extra horses? took me 25 min to install very simple and easy. the installations requires a 18mm socket for the tensioner, and 7mm for the bolts where the crankshaft pulley is located. very easy make sure you use a 6rib 96" belt worked fine and its on with a perfect fit, took it to the dyno before this upgrade, dynoed 183HP, with a AMERICAN MUSCLE CAI, and a tune from SCT well worth the money, Took after the install 216HP with the SCT this product works great feels good/ looks good. very good product definitly worth the money will be uploading pics thanks AMERICAN MUSCLE will be installing theBBK 56mm Throttle Body next.

Bbk underdrive pulley set, the product is really nice, no dislikes, the install was very simple took 15 Min on the underdrive pulley you need a 10mm to loosen those four bolts, after you loosen those bolts you need an 18mm wrench to loosen the belt tensionor, after that's done take the belt off. Take the bottom four bolts coompleatly off of the underdrive slips right off replace with the bbk underive and replace bolts make sure you use the tork spec from the owners Manuel from ford. After that's done move on to the alternator remove off (if you do not have a air impact gun) take to local oralleys store they do it for free. But if you do have leave on there and replace pulley. Make sure you get a 6rib 96" belt it fit perfact on my car. After that you are done, turn on car see if belt does not slip if it doesn't you are good.
After this install I took my car from Arizona to California over memorial day weekly end I actually got around 29-33 mpg and little more noticeable horses
Hopes this helps.

Very easy and painless install. The hardest part about this install was finding the right belt, considering the 96 in belt was far from the right. I went with a 92 in belt in the end. Took the alternator off and took it to an oreillys, and they changed the A pulley for me. Very easy

I installed the kit myself. I recommend only attempting if you can use impact wrench. I purchased a 91" belt which fit tight. Disconnect negative battery terminal. After computer re-learns alternator/AC functions, there is no loss in battery or air conditioning. I installed a K&N CAI at the same time and I am VERY happy with the difference in performance. I went joy riding on curvy country roads for hours afterward.

Noticed a little HP increase with higher RPM's. The pulleys make my car run much smoother. At idle and slow speeds the car is nice and quiet and idles a lot smoother than it did before. One of the camshaft pulley screws somehow broke when installing. I ended up using a 6 rib 94in belt which fit tight. Great product and can help make your car last longer. I am satisfied with them.

Went and had installed today also with new plugs and wires, and i cannot believe the before and after difference, the throttle response is crazy and really seems to help in the 3000-5000 RPM range,easy install, and used a 95.5 serpentine belt, the 96 felt a little loose, as im sure it might stretch eventually. thanks AM!!

Me and my cousin installed my under drive pulleys.
I took another posters advice and it was correct. The description calls for a 96 inch length belt, but its actually a 6 rib 91 inch belt. The crankshaft pulley was extremely hard to get off, and we ended up having to buy an air wrench, only 70 bucks from a pawn shop. All and all, it was worth it.

Didn't know how much of a difference the pulleys would make but WOW definitely a noticeable difference! The throttle response has improved quite a bit! My engine doesn't shake hardy at all.
The install took about an hour. Had to take the alternator to someone with an impact gun. I first bought a 94'' belt but it was to small so I went with the 96'', fit great!
Good bolt on! Buy it!

BBK Underdrive Pulleys (94-98 V6)

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